BIOL 260 Chapter Notes - Chapter 5.1: Collagen, Formaldehyde, Ectoderm
Document Summary
Tissue: a group of similar cells and cell products that arise from the same region of the embryo and work together to perform a specific structural or physiological role in an organ: 4 primary types of tissues: 1. ) epithelial: tissues composed of layers of closely spaced cells that cover organ surfaces, form glands, and serve for protection, secretion, and absorption. Appears in the epidermis, inner lining of digestive tract, liver and other glands. Cells are so close together that the matrix is scarcely visible. 2. ) connective: tissues with usually more matrix than cell volume, often specialized to support, bind, and protect organs. Appears in tendons, ligaments, cartilage, bones, and blood. Matrix occupies more space than the cells do. 3. ) nervous: tissue containing excitable cells specialized for rapid transmission of coded information to the other cell. Appears in brain, spinal cord, and nerves. 4. ) muscular: tissues composed of elongated, excitable muscles cells specialized for contraction.
